Amused by the online video, Dion offered Dunn tickets to her show – and the use of her private bathroom in a message she posted last week – and now she has invited the Internet sensation to join her on July 4.

Sources tell TMZ.com he’ll be in the audience for her concert at Caesar’s Palace and Dion has agreed to put him and a guest up at the hotel. She is also planning to meet Dunn before she hits the stage.